Value of Time Evaluation of High Speed Railway Users in Turkey

Value of supplier's capacity information in a two-echelon supply chain Bakal, İsmail Serdar; Güllü, Refik; Erkip, Nesim; Department of Industrial Engineering (2003) In traditional supply chain context, it is generally assumed that full information is available for all the parties involved. Although it seems reasonable in some settings, there are also cases where chain members are independent agents and possess different levels of information. In this study, we analyze a two-echelon, single suppher-multiple retailer supply chain in a single period setting where the capacity of the supplier is limited. Embedding the information asymmetry about the capacity of the supplie...
Value of supplier's capacity information in a two-echelon supply chain Bakal, İsmail Serdar; GÜLLÜ, AHMET REFİK (2011-11-01) In traditional supply chain models it is generally assumed that full information is available to all parties involved. Although this seems reasonable, there are cases where chain members are independent agents and possess different levels of information. In this study, we analyze a two-echelon, single supplier-multiple retailers supply chain in a single-period setting where the capacity of the supplier is limited. Embedding the lack of information about the capacity of the supplier in the model, we aim to a...
Value of quality information of returns in product recovery management Bayındır, Zeynep Pelin (null; 2009-07-05) Valueofqualityinformationofreturnsinproductre- covery managementZ. Pelin Bayindir, Department of Industrial Engineering, Middle East Technical University, Middle East Technical University, Department of Industrial Engineering, 06531, Ankara, Turkey, bayindir@ie.metu.edu.tr,Altan AtabarutWe consider a recovery system where end-of-life products are con- verted to a number of different recovered products. Recovery op- tions for a return depend on its level of quality, i.e., grade. The main objective of the stu...
Value of quality information of returns in product recovery management Atabarut, Altan; Bayındır, Zeynep Pelin; Department of Industrial Engineering (2009) Returned products of many industries are transported backwards through supply chains for recovery, thus forming “closed-loop supply chains”. Benefits, forthcoming with more effective management of recovery of returns are gaining importance. However, some issues, such as lack of information required to assess the quality of the returned products, may translate into critical uncertainties in the product recovery decisions and prevent closed-loop supply chains from operating efficiently. Hence, it is envisaged...
Value of supplier flexibility and initial shelf life information for perishable items in an EOQ environment Ünsal, Saime Ceren; Bakal, İsmail Serdar; Department of Industrial Engineering (2019) Managing items with shelf life is a challenging task in inventory planning. In this study, we consider an infinite horizon, continuous review inventory model with deterministic stationary demand where the shelf life of the items is uncertain. The initial shelf life of the incoming items from the supplier is a discrete random variable. When the age of the items reaches the initial shelf life, a quality control test for which the outcome is random is applied. According to the result of this test, it is possib...

Citation Formats

G. Dalkıç Melek and H. Tüydeş Yaman, “Value of Time Evaluation of High Speed Railway Users in Turkey,” presented at the European Transport Conference 2020, Milan, İtalya, 2020, Accessed: 00, 2021. [Online]. Available: https://aetransport.org/past-etc-papers/conference-papers-2020?abstractId=6930ampstate=b.